Le seminaire "Mobilites, Migrations et Diasporas d'Asie du Sud. La construction de nouveaux mondes" (MIDAS)est un seminaire de recherche pluridisciplinaire dont l’objet est l’etude des formes de mobilites a differentes echelles des populations d’Asie du Sud. La premiere seance definit les grandes orientations theoriques du seminaire. Communication d'Aurélie Varrel et de Tristan Brusle. Internet website : http://midas.hypotheses.org. MIDAS is a multidisciplinary monthly research seminar based in Paris (France). It focuses on different forms of mobility of South Asian populations. Internal, international and transnational migrations and diasporas are studied by researchers. People's relations with places of origin and destination will be particularely studied. Communication language in the seminar is French.